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x86, flags: Rename X86_EFLAGS_BIT1 to X86_EFLAGS_FIXED 

Bit 1 in the x86 EFLAGS is always set.  Name the macro something that
actually tries to explain what it is all about, rather than being a
tautology.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Gleb Natapov <gleb@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Link: http://lkml.kernel.org/n/tip-f10rx5vjjm6tfnt8o1wseb3v@git.kernel.org
This commit is contained in:
H. Peter Anvin 2013-04-27 16:10:11 -07:00
parent 2fc016c5bd
commit 1adfa76a95
6 changed files with 6 additions and 6 deletions
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2
arch/x86/include/uapi/asm/processor-flags.h
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@ -6,7 +6,7 @@
* EFLAGS bits
*/
#define X86_EFLAGS_CF 0x00000001 /* Carry Flag */
#define X86_EFLAGS_BIT1 0x00000002 /* Bit 1 - always on */
#define X86_EFLAGS_FIXED 0x00000002 /* Bit 1 - always on */
#define X86_EFLAGS_PF 0x00000004 /* Parity Flag */
#define X86_EFLAGS_AF 0x00000010 /* Auxiliary carry Flag */
#define X86_EFLAGS_ZF 0x00000040 /* Zero Flag */

2
arch/x86/kernel/entry_64.S
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@ -365,7 +365,7 @@ ENDPROC(native_usergs_sysret64)
/*CFI_REL_OFFSET ss,0*/
pushq_cfi %rax /* rsp */
CFI_REL_OFFSET rsp,0
pushq_cfi $(X86_EFLAGS_IF|X86_EFLAGS_BIT1) /* eflags - interrupts on */
pushq_cfi $(X86_EFLAGS_IF|X86_EFLAGS_FIXED) /* eflags - interrupts on */
/*CFI_REL_OFFSET rflags,0*/
pushq_cfi $__KERNEL_CS /* cs */
/*CFI_REL_OFFSET cs,0*/

2
arch/x86/kernel/process_32.c
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@ -147,7 +147,7 @@ int copy_thread(unsigned long clone_flags, unsigned long sp,
childregs->bp = arg;
childregs->orig_ax = -1;
childregs->cs = __KERNEL_CS | get_kernel_rpl();
childregs->flags = X86_EFLAGS_IF | X86_EFLAGS_BIT1;
childregs->flags = X86_EFLAGS_IF | X86_EFLAGS_FIXED;
p->fpu_counter = 0;
p->thread.io_bitmap_ptr = NULL;
memset(p->thread.ptrace_bps, 0, sizeof(p->thread.ptrace_bps));

2
arch/x86/kernel/process_64.c
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@ -176,7 +176,7 @@ int copy_thread(unsigned long clone_flags, unsigned long sp,
childregs->bp = arg;
childregs->orig_ax = -1;
childregs->cs = __KERNEL_CS | get_kernel_rpl();
childregs->flags = X86_EFLAGS_IF | X86_EFLAGS_BIT1;
childregs->flags = X86_EFLAGS_IF | X86_EFLAGS_FIXED;
return 0;
}
*childregs = *current_pt_regs();

2
arch/x86/kvm/vmx.c
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@ -7942,7 +7942,7 @@ static void load_vmcs12_host_state(struct kvm_vcpu *vcpu,
kvm_register_write(vcpu, VCPU_REGS_RSP, vmcs12->host_rsp);
kvm_register_write(vcpu, VCPU_REGS_RIP, vmcs12->host_rip);
vmx_set_rflags(vcpu, X86_EFLAGS_BIT1);
vmx_set_rflags(vcpu, X86_EFLAGS_FIXED);
/*
* Note that calling vmx_set_cr0 is important, even if cr0 hasn't
* actually changed, because it depends on the current state of

2
drivers/lguest/x86/core.c
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@ -700,7 +700,7 @@ void lguest_arch_setup_regs(struct lg_cpu *cpu, unsigned long start)
* interrupts are enabled. We always leave interrupts enabled while
* running the Guest.
*/
regs->eflags = X86_EFLAGS_IF | X86_EFLAGS_BIT1;
regs->eflags = X86_EFLAGS_IF | X86_EFLAGS_FIXED;
/*
* The "Extended Instruction Pointer" register says where the Guest is